fteqw/engine/client/cl_demo.c

/*
Copyright (C) 1996-1997 Id Software, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the included (GNU.txt) GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#include "quakedef.h"
#include "fs.h"

void CL_FinishTimeDemo (void);
float demtime;
int demoframe;

int cls_lastto;
int cls_lasttype;

void CL_PlayDemo(char *demoname);
char lastdemoname[256];

extern cvar_t qtvcl_forceversion1;
extern cvar_t qtvcl_eztvextensions;

unsigned char demobuffer[1024*66];
int demobuffersize;
int demopreparsedbytes;
qboolean disablepreparse;
qboolean endofdemo;

#define BUFFERTIME 0.5
/*
==============================================================================

DEMO CODE

When a demo is playing back, all NET_SendMessages are skipped, and
NET_GetMessages are read from the demo file.

Whenever cl.time gets past the last received message, another message is
read from the demo file.
==============================================================================
*/

/*
==============
CL_StopPlayback

Called when a demo file runs out, or the user starts a game
==============
*/
void CL_StopPlayback (void)
{
	if (!cls.demoplayback)
		return;

	Media_CaptureDemoEnd();

	VFS_CLOSE (cls.demoinfile);
	cls.demoinfile = NULL;
	cls.state = ca_disconnected;
	cls.demoplayback = DPB_NONE;
	cls.demoseeking = false;	//just in case

	if (cls.demoindownload)
		cls.demoindownload->status = DL_FAILED;
	cls.demoindownload = NULL;

	if (cls.timedemo)
		CL_FinishTimeDemo ();
}

/*
====================
CL_WriteDemoCmd

Writes the player0 user cmd (demos don't support split screen)
====================
*/
void CL_WriteDemoCmd (usercmd_t *pcmd)
{
	int		i;
	float	fl;
	qbyte	c;
	q1usercmd_t cmd;

	//nq doesn't have this info
	if (cls.demorecording != 1)
		return;

//Con_Printf("write: %ld bytes, %4.4f\n", msg->cursize, demtime);

	fl = LittleFloat((float)demtime);
	VFS_WRITE (cls.demooutfile, &fl, sizeof(fl));

	c = dem_cmd;
	VFS_WRITE (cls.demooutfile, &c, sizeof(c));

	// correct for byte order, bytes don't matter

	cmd.buttons = pcmd->buttons;
	cmd.impulse = pcmd->impulse;
	cmd.msec = pcmd->msec;

	for (i = 0; i < 3; i++)
		cmd.angles[i] = LittleFloat(pcmd->angles[i]*65536/360);

	cmd.forwardmove = LittleShort(pcmd->forwardmove);
	cmd.sidemove    = LittleShort(pcmd->sidemove);
	cmd.upmove      = LittleShort(pcmd->upmove);

	VFS_WRITE (cls.demooutfile, &cmd, sizeof(cmd));

	for (i=0 ; i<3 ; i++)
	{
		fl = LittleFloat (cl.playerview[0].viewangles[i]);
		VFS_WRITE (cls.demooutfile, &fl, 4);
	}

	VFS_FLUSH (cls.demooutfile);
}

/*
====================
CL_WriteDemoMessage

Dumps the current net message, prefixed by the length and view angles
====================
*/
void CL_WriteDemoMessage (sizebuf_t *msg, int payloadoffset)
{
	int		len;
	int		i;
	float	fl;
	qbyte	c;

//Con_Printf("write: %ld bytes, %4.4f\n", msg->cursize, demtime);

	switch (cls.demorecording)
	{
	case 0:
		return;
	case 1:	//QW
		fl = LittleFloat((float)demtime);
		VFS_WRITE (cls.demooutfile, &fl, sizeof(fl));

		c = dem_read;
		VFS_WRITE (cls.demooutfile, &c, sizeof(c));

		if (*(int*)msg->data == -1)
		{
			//connectionless packet.
			len = LittleLong (msg->cursize);
			VFS_WRITE (cls.demooutfile, &len, 4);
			VFS_WRITE (cls.demooutfile, msg->data + msg_readcount, msg->cursize - msg_readcount);
		}
		else
		{
			//regenerate a legacy netchan. no fragmentation support, but whatever. this ain't udp.
			//the length
			len = LittleLong (msg->cursize - msg_readcount + 8);
			VFS_WRITE (cls.demooutfile, &len, 4);
			//hack the netchan here.
			i = cls.netchan.incoming_sequence;
			VFS_WRITE (cls.demooutfile, &i, 4);
			i = cls.netchan.incoming_acknowledged;
			VFS_WRITE (cls.demooutfile, &i, 4);
			//and the data
			VFS_WRITE (cls.demooutfile, msg->data + msg_readcount, msg->cursize - msg_readcount);
		}
		break;
	case 2:	//NQ
		len = LittleLong (net_message.cursize - payloadoffset);
		VFS_WRITE(cls.demooutfile, &len, sizeof(len));
		for (i=0 ; i<3 ; i++)
		{
			float f = LittleFloat (cl.playerview[0].viewangles[i]);
			VFS_WRITE(cls.demooutfile, &f, sizeof(f));
		}
		VFS_WRITE(cls.demooutfile, net_message.data + payloadoffset, net_message.cursize - payloadoffset);
		break;
	}
	VFS_FLUSH (cls.demooutfile);
}

int demo_preparsedemo(unsigned char *buffer, int bytes)
{
	int parsed = 0;
	int ofs;
	unsigned int length;
#define dem_mask 7
	if (cls.demoplayback != DPB_MVD && cls.demoplayback != DPB_EZTV)
		return bytes;	//no need if its not an mvd (this simplifies it a little)

	while (bytes>2)
	{
		switch(buffer[1]&dem_mask)
		{
		case dem_cmd:
			ofs = -(int)(sizeof(q1usercmd_t));
			ofs = 0;
			break;
		case dem_set:
			ofs = -(8);
			break;
		case dem_multiple:
			ofs = 6;
			break;
		default:
			ofs = 2;
			break;
		}
		if (ofs > 0)
		{
			if (ofs+4 > bytes)
				break;
			length = (buffer[ofs+0]<<0) + (buffer[ofs+1]<<8) + (buffer[ofs+2]<<16) + (buffer[ofs+3]<<24);
			if (length > MAX_OVERALLMSGLEN)
			{
				disablepreparse = true;
				Con_Printf("Error looking ahead at demo\n");
				return parsed;
			}
			ofs+=4;
		}
		else
		{
			length = -ofs;
			ofs = 2;
		}
		//ofs is now the offset of the data
		if (ofs+length > bytes)
		{
			return parsed; //not got it all
		}
		if ((buffer[1]&dem_mask) == dem_all && (buffer[1] & ~dem_mask) && length < MAX_OVERALLMSGLEN)
		{
			net_message.cursize = length;
			memcpy(net_message.data, buffer+ofs, length);
			MSG_BeginReading(cls.netchan.netprim);
			CLQW_ParseServerMessage();
		}

		parsed += ofs+length;
		buffer += ofs+length;
		bytes -= ofs+length;
	}

	return parsed;
}

int readdemobytes(int *readpos, void *data, int len)
{
	int i;
	int trybytes;
	if (len < 0)
		Host_EndGame("Corrupt demo");

	if (demopreparsedbytes < 0)	//won't happen in normal running, but can still happen on corrupt data... if we don't disconnect first.
	{
		Con_Printf("reset preparsed (underflow)\n");
		demopreparsedbytes = 0;
	}
	if (demopreparsedbytes > demobuffersize)
	{
		Con_Printf("reset preparsed (overflow)\n");
		demopreparsedbytes = 0;
	}

	trybytes = sizeof(demobuffer)-demobuffersize;

	i = VFS_READ(cls.demoinfile, demobuffer+demobuffersize, trybytes);
	if (i > 0)
	{
		demobuffersize += i;
		if (disablepreparse)
			demopreparsedbytes = demobuffersize;
		else
			demopreparsedbytes += demo_preparsedemo(demobuffer+demopreparsedbytes, demobuffersize-demopreparsedbytes);
	}

	if (*readpos+len > demobuffersize)
	{
		if (i < 0)
		{	//0 means no data available yet
			endofdemo = true;
			return 0;
		}
//		len = demobuffersize;
		return 0;
	}
	memcpy(data, demobuffer+*readpos, len);
	*readpos += len;
	return len;
}

void demo_flushbytes(int bytes)
{
	if (bytes > demobuffersize)
		Sys_Error("demo_flushbytes: flushed too much!\n");
	memmove(demobuffer, demobuffer+bytes, demobuffersize - bytes);
	demobuffersize -= bytes;

	if (demopreparsedbytes < bytes)
		demopreparsedbytes = 0;
	else
		demopreparsedbytes -= bytes;
}

void demo_flushcache(void)
{
	demobuffersize = 0;
	demopreparsedbytes = 0;

	//no errors yet
	disablepreparse = false;
}

void demo_resetcache(int bytes, void *data)
{
	endofdemo = false;
	demo_flushcache();

	demobuffersize = bytes;
	demopreparsedbytes = 0;
	memcpy(demobuffer, data, bytes);

	//preparse it now
	bytes = 0;
	readdemobytes(&bytes, NULL, 0);
}


void CL_ProgressDemoTime(void)
{
	extern cvar_t cl_demospeed;

	if (cl.parsecount && Media_PausedDemo())
	{	//console visible whilst democapturing
		cls.netchan.last_received = realtime;
		return;
	}

	if (cl_demospeed.value >= 0 && cls.state == ca_active)
		demtime += host_frametime*cl_demospeed.value;
	else
		demtime += host_frametime;
}

void CL_DemoJump_f(void)
{
	float newtime;
	char *s = Cmd_Argv(1);
	char *colon = strchr(s, ':');

	if (!cls.demoplayback)
		return;

	if (*s == '+' || *s == '-')
	{
		if (colon)
		{
			colon++;
			newtime = demtime + atoi(colon) + atoi(s)*60;
		}
		else
			newtime = demtime + atoi(s);
	}
	else
	{
		//absolute seek time
		if (colon)
		{
			colon++;
			newtime = atoi(colon);
			newtime += atoi(s)*60;
		}
		else
			newtime = atoi(s);
	}
	if (newtime < 0)
		newtime = 0;

	if (newtime >= demtime)
		cls.demoseektime = newtime;
	else
	{
		Con_Printf("Rewinding demo\n");
		CL_PlayDemo(lastdemoname);

		//now fastparse it.
		cls.demoseektime = newtime;
	}
	cls.demoseeking = true;
}

/*
====================
CL_GetDemoMessage

  FIXME...
====================
*/

vec3_t demoangles;
float olddemotime = 0;
float nextdemotime = 0;
qboolean CL_GetDemoMessage (void)
{
	int		r, i, j, tracknum;
	float	f;
	float	demotime;
	qbyte	c, msecsadded=0;
	usercmd_t *pcmd;
	q1usercmd_t q1cmd;
	int demopos = 0;
	int msglength;

	if (endofdemo)
	{
		endofdemo = false;
		CL_StopPlayback ();
		return 0;
	}

#ifdef NQPROT
	if (cls.demoplayback == DPB_NETQUAKE
#ifdef Q2CLIENT
		|| cls.demoplayback == DPB_QUAKE2
#endif
		)
	{	//read the nq demo

		//if we've finished reading the connection part of the demo, but not finished loading, pause the demo
		if (cls.signon == 1 && !cl.worldmodel)
		{
			demtime = cl.gametime;
			return 0;
		}

		//if this is the starting frame of a timedemo
		if (cls.timedemo)
		if (cls.td_startframe == -1 && cls.state == ca_active)
		{	//start the timer only once we are connected.
			cls.td_starttime = Sys_DoubleTime();
			cls.td_startframe = host_framecount;

			//force the console up, we're done loading.
			Key_Dest_Remove(kdm_console);
			Key_Dest_Remove(kdm_menu);
			scr_con_current = 0;
		}

#ifdef Q2CLIENT
		if (cls.demoplayback == DPB_QUAKE2 && (cls.netchan.last_received == realtime || cls.netchan.last_received > realtime-0.1))
			return 0;
		else
#endif
			if (cls.demoplayback == DPB_NETQUAKE && cls.signon == 4/*SIGNONS*/)
		{
			if (!demtime)
			{
				cl.gametime = 0;
				cl.gametimemark = demtime;
				olddemotime = 0;
				return 0;
			}
			cls.netchan.last_received = realtime;
			if ((cls.timedemo && host_framecount == demoframe) || (!cls.timedemo && demtime<= cl.gametime && cl.gametime))// > dem_lasttime+demtime)
			{
				if (demtime <= cl.gametime-1)
					demtime = cl.gametime;
				return 0;
			}
			demoframe = host_framecount;
		}
		if (readdemobytes(&demopos, &msglength, 4) != 4)
		{
			return 0;
		}
		if (cls.demoplayback == DPB_NETQUAKE)
		{
			for (i=0 ; i<3 ; i++)
			{
				readdemobytes(&demopos, &f, 4);
				demoangles[i] = LittleFloat (f);
			}
		}

		olddemotime = demtime;

		msglength = LittleLong (msglength);
		if (msglength > MAX_NQMSGLEN)
		{
			Con_Printf ("Demo message > MAX_MSGLEN");
			CL_StopPlayback ();
			return 0;
		}
		if (readdemobytes(&demopos, net_message.data, msglength) != msglength)
		{
			return 0;
		}
		demo_flushbytes(demopos);
		net_message.cursize = msglength;

		return 1;
	}
#endif

readnext:
	if (demopos)
	{
		demo_flushbytes(demopos);
		demopos = 0;
	}

	// read the time from the packet
	if (cls.demoplayback == DPB_MVD || cls.demoplayback == DPB_EZTV)
	{
		if (demtime < 0)
		{
			readdemobytes(&demopos, NULL, 0);	//keep it feeding through
			return 0;
		}
		if (olddemotime > demtime)
			olddemotime = demtime;
		if (demtime + 1.0 < olddemotime)
			demtime = olddemotime - 1.0;

		if (readdemobytes(&demopos, &msecsadded, sizeof(msecsadded)) != sizeof(msecsadded))
		{
			Con_DPrintf("Not enough buffered\n");
			demotime = olddemotime;
			nextdemotime = demotime;
			return 0;
		}
		else
		{
			demotime = olddemotime + msecsadded*(1.0f/1000);
			nextdemotime = demotime;
		}
	}
	else
	{
		if (readdemobytes(&demopos, &demotime, sizeof(demotime)) != sizeof(demotime))
		{
			Con_DPrintf("Not enough buffered\n");
			olddemotime = demtime;	//if we ran out of buffered demo, delay the demo parsing a little
			return 0;
		}
		demotime = LittleFloat(demotime);
	}

	if (cl.sendprespawn)
	{
		CL_RequestNextDownload();
		if (!cls.timedemo)
			return 0;
	}


// decide if it is time to grab the next message
	if (cls.demoseeking)
	{
		demtime = demotime;	//warp
		if (demtime >= cls.demoseektime)
			cls.demoseeking = false;
	}
	else if (cls.timedemo)
	{
		if (cls.td_lastframe < 0)
			cls.td_lastframe = demotime;
		else if (demotime > cls.td_lastframe)
		{
			cls.td_lastframe = demotime;
			return 0;		// already read this frame's message
		}
		if (cls.td_startframe == -1 && cls.state == ca_active)
		{	//start the timer only once we are connected.
			cls.td_starttime = Sys_DoubleTime();
			cls.td_startframe = host_framecount;

			//force the console up, we're done loading.
			Key_Dest_Remove(kdm_console);
			scr_con_current = 0;
		}
		if (cls.td_startframe == host_framecount+1)
			cls.td_starttime = Sys_DoubleTime();
		demtime = demotime; // warp
	}
	else if (!cl.paused && cls.state >= ca_onserver)
	{	// always grab until fully connected
		if (demtime + 1.0 < demotime)
		{
			// too far back
			demtime = demotime - 1.0;
			return 0;
		}
		else if (demtime < demotime)
		{
			return 0;		// don't need another message yet
		}
	}
	else
		demtime = demotime; // we're warping

	if (cls.demoplayback == DPB_MVD || cls.demoplayback == DPB_EZTV)
	{
		if ((msecsadded || cls.netchan.incoming_sequence < 2) && olddemotime != demotime)
		{
			if (!(cls.fteprotocolextensions2 & PEXT2_REPLACEMENTDELTAS))
			{
				cls.netchan.incoming_sequence++;
				cls.netchan.incoming_acknowledged++;
			}
			cls.netchan.frame_latency = 0;
			cls.netchan.last_received = realtime; // just to happy timeout check
		}
	}

	if (cls.state < ca_demostart)
		Host_Error ("CL_GetDemoMessage: cls.state != ca_active");

	// get the msg type
	if (readdemobytes (&demopos, &c, sizeof(c)) != sizeof(c))
	{
		Con_DPrintf("Not enough buffered\n");
		olddemotime = demtime+1;
		return 0;
	}
	switch (c&7)
	{
	case dem_cmd :
		if (cls.demoplayback == DPB_MVD)
		{
			Con_Printf("mvd demos/qtv streams should not contain dem_cmd\n");
			olddemotime = demtime+1;
			CL_StopPlayback ();
			return 0;
		}
		else
		{
			// user sent input
			i = cls.netchan.outgoing_sequence & UPDATE_MASK;
			pcmd = &cl.outframes[i].cmd[0];
			r = readdemobytes (&demopos, &q1cmd, sizeof(q1cmd));
			if (r != sizeof(q1cmd))
			{
				Con_DPrintf("Not enough buffered\n");
				olddemotime = demtime+1;
				CL_StopPlayback ();
				return 0;
			}
			// byte order stuff
			for (j = 0; j < 3; j++)
			{
				q1cmd.angles[j] = LittleFloat(q1cmd.angles[j]);
				pcmd->angles[j] = ((int)(q1cmd.angles[j]*65536.0/360)&65535);
			}
			pcmd->forwardmove = q1cmd.forwardmove	= LittleShort(q1cmd.forwardmove);
			pcmd->sidemove = q1cmd.sidemove			= LittleShort(q1cmd.sidemove);
			pcmd->upmove = q1cmd.upmove				= LittleShort(q1cmd.upmove);
			pcmd->msec = q1cmd.msec;
			pcmd->buttons = q1cmd.buttons;


			cl.outframes[i].senttime = realtime;
			cl.outframes[i].server_message_num = cl.validsequence;
			cl.outframes[i].cmd_sequence = cl.movesequence;
			cls.netchan.outgoing_sequence++;
			cl.movesequence = cls.netchan.outgoing_sequence;
			for (i=0 ; i<3 ; i++)
			{
				readdemobytes (&demopos, &f, 4);
				demoangles[i] = LittleFloat (f);
				cl.playerview[0].viewangles[i] = LittleFloat (f);
			}
			goto readnext;
		}
		break;

	case dem_read:
readit:
		// get the next message
		if (readdemobytes (&demopos, &msglength, 4) != 4)
		{
			Con_DPrintf("Not enough buffered\n");
			olddemotime = demtime+1;
			return 0;
		}
		msglength = LittleLong (msglength);
	//Con_Printf("read: %ld bytes\n", msglength);
		if ((unsigned int)msglength > MAX_OVERALLMSGLEN)
		{
			Con_Printf ("Demo message > MAX_OVERALLMSGLEN\n");
			CL_StopPlayback ();
			return 0;
		}
		if (readdemobytes (&demopos, net_message.data, msglength) != msglength)
		{
			Con_DPrintf("Not enough buffered\n");
			olddemotime = demtime+1;
			return 0;
		}
		net_message.cursize = msglength;

		if (cls.demoplayback == DPB_MVD || cls.demoplayback == DPB_EZTV)
		{
			int seat;
			switch(cls_lasttype)
			{
			case dem_multiple:
				for (seat = 0; seat < cl.splitclients; seat++)
				{
					tracknum = cl.playerview[seat].cam_spec_track;
					if (!cl.playerview[seat].cam_auto)
						tracknum = -1;
					if (tracknum == -1 || !(cls_lastto & (1 << tracknum)))
						continue;
				}
				if (seat == cl.splitclients)
				{
					olddemotime = demotime;
					goto readnext;
				}
				break;
			case dem_single:
				for (seat = 0; seat < cl.splitclients; seat++)
				{
					tracknum = cl.playerview[seat].cam_spec_track;
					if (!cl.playerview[seat].cam_auto)
						tracknum = -1;
					if (tracknum == -1 || !(cls_lastto != tracknum))
						continue;
				}
				if (seat == cl.splitclients)
				{
					olddemotime = demotime;
					goto readnext;
				}
				break;
			case dem_all:
				if (c & ~dem_mask)
				{
					olddemotime = demotime;
					goto readnext;
				}
				break;
			}
		}
		break;

	case dem_set :
		if (readdemobytes (&demopos, &j, 4) != 4)
		{
			olddemotime = demtime;
			return 0;
		}
		if (readdemobytes (&demopos, &i, 4) != 4)
		{
			olddemotime = demtime;
			return 0;
		}
		cls.netchan.outgoing_sequence = LittleLong(j);
		cls.netchan.incoming_sequence = LittleLong(i);
		cl.movesequence = cls.netchan.outgoing_sequence;

		if (cls.demoplayback == DPB_MVD || cls.demoplayback == DPB_EZTV)
			cls.netchan.incoming_acknowledged = cls.netchan.incoming_sequence;
		goto readnext;

	case dem_multiple:
		if (readdemobytes (&demopos, &i, sizeof(i)) != sizeof(i))
		{
			olddemotime = demtime;
			return 0;
		}
		cls_lastto = LittleLong(i);
		cls_lasttype = dem_multiple;
		goto readit;

	case dem_single:
		cls_lastto = c >> 3;
		cls_lasttype = dem_single;
		goto readit;

	case dem_stats:
		cls_lastto = c >> 3;
		cls_lasttype = dem_stats;
		goto readit;

	case dem_all:
		cls_lastto = 0;
		cls_lasttype = dem_all;
		goto readit;

	default :
		Con_Printf("Corrupted demo.\n");
		CL_StopPlayback ();
		return 0;
	}
	demo_flushbytes(demopos);

	olddemotime = demotime;
//	cls.td_lastframe = host_framecount;

	return 1;
}

/*
====================
CL_GetMessage

Handles recording and playback of demos, on top of NET_ code
====================
*/
qboolean CL_GetMessage (void)
{
	if	(cls.demoplayback != DPB_NONE)
		return CL_GetDemoMessage ();

	if (NET_GetPacket (NS_CLIENT, 0) < 0)
		return false;

	return true;
}

/*
====================
CL_Stop_f

stop recording a demo
====================
*/
void CL_Stop_f (void)
{
	if (!cls.demorecording)
	{
#ifndef CLIENTONLY
		SV_MVDStop_f();
#else
		Con_Printf ("Not recording a demo.\n");
#endif
		return;
	}

// write a disconnect message to the demo file
	SZ_Clear (&net_message);
	MSG_WriteLong (&net_message, -1);	// -1 sequence means out of band
	MSG_WriteByte (&net_message, svc_disconnect);
	MSG_WriteString (&net_message, "EndOfDemo");
	CL_WriteDemoMessage (&net_message, sizeof(int));

// finish up
	VFS_CLOSE (cls.demooutfile);
	cls.demooutfile = NULL;
	cls.demorecording = false;
	Con_Printf ("Completed demo\n");
}


/*
====================
CL_WriteDemoMessage

Dumps the current net message, prefixed by the length and view angles
====================
*/
void CL_WriteRecordDemoMessage (sizebuf_t *msg, int seq)
{
	int		len;
	int		i;
	float	fl;
	qbyte	c;

//Con_Printf("write: %ld bytes, %4.4f\n", msg->cursize, demtime);

	if (!cls.demorecording)
		return;

	fl = LittleFloat((float)demtime);
	VFS_WRITE (cls.demooutfile, &fl, sizeof(fl));

	c = dem_read;
	VFS_WRITE (cls.demooutfile, &c, sizeof(c));

	len = LittleLong (msg->cursize + 8);
	VFS_WRITE (cls.demooutfile, &len, 4);

	i = LittleLong(seq);
	VFS_WRITE (cls.demooutfile, &i, 4);
	VFS_WRITE (cls.demooutfile, &i, 4);

	VFS_WRITE (cls.demooutfile, msg->data, msg->cursize);

	VFS_FLUSH (cls.demooutfile);
}


void CL_WriteSetDemoMessage (void)
{
	int		len;
	float	fl;
	qbyte	c;

//Con_Printf("write: %ld bytes, %4.4f\n", msg->cursize, demtime);

	if (cls.demorecording != 1)
		return;

	fl = LittleFloat((float)demtime);
	VFS_WRITE (cls.demooutfile, &fl, sizeof(fl));

	c = dem_set;
	VFS_WRITE (cls.demooutfile, &c, sizeof(c));

	len = LittleLong(cls.netchan.outgoing_sequence);
	VFS_WRITE (cls.demooutfile, &len, 4);
	len = LittleLong(cls.netchan.incoming_sequence);
	VFS_WRITE (cls.demooutfile, &len, 4);

	VFS_FLUSH (cls.demooutfile);
}


/*
record a single player game.
*/
#ifndef CLIENTONLY
mvddest_t *SV_InitRecordFile (char *name);
qboolean SV_MVD_Record (mvddest_t *dest);
void CL_RecordMap_f (void)
{
	char demoname[MAX_QPATH];
	char mapname[MAX_QPATH];
	char *demoext;
	Q_strncpyz(demoname, Cmd_Argv(1), sizeof(demoname));
	Q_strncpyz(mapname, Cmd_Argv(2), sizeof(mapname));
	CL_Disconnect_f();

	SV_SpawnServer (mapname, NULL, false, false);

	COM_DefaultExtension(demoname, ".mvd", sizeof(demoname));
	demoext = COM_FileExtension(demoname);

	if (!strcmp(demoext, "mvd"))
	{
		if (!SV_MVD_Record (SV_InitRecordFile(demoname)))
			CL_Disconnect_f();
//		char buf[512];
//		Cbuf_AddText(va("mvdrecord %s\n", COM_QuotedString(demoname, buf, sizeof(buf))), RESTRICT_LOCAL);
	}
	else
	{
		cls.demooutfile = FS_OpenVFS (demoname, "wb", FS_GAME);
		if (!cls.demooutfile)
		{
			CL_Disconnect_f();
			return;
		}
		if (!strcmp(demoext, "dem"))
		{
			cls.demorecording = 2;
			VFS_PUTS(cls.demooutfile, "-1\n");
		}
		else
			cls.demorecording = 1;
		CL_WriteSetDemoMessage();
	}
}
#endif

/*
====================
CL_Record_f

record <demoname> <server>
====================
*/
void CL_Record_f (void)
{
	int		c;
	char	name[MAX_OSPATH];
	sizebuf_t	buf;
	char	buf_data[MAX_QWMSGLEN];
	int n, i, j;
	char *s, *p, *fname;
	entity_t *ent;
	entity_state_t *es;
	player_info_t *player;
	extern	char gamedirfile[];
	int seq = 1;

	c = Cmd_Argc();
	if (c > 2)
	{
#ifndef CLIENTONLY
		CL_RecordMap_f();
#endif
		Con_Printf ("record <demoname>\n");
		return;
	}

	if (cls.state != ca_active)
	{
		Con_Printf ("You must be connected to record.\n");
		return;
	}

	if (cls.demorecording)
		CL_Stop_f();

	if (c == 2)	//user supplied a name
	{
		fname = Cmd_Argv(1);
	}
	else
	{	//automagically generate a name
		if (cl.spectator)
		{	// FIXME: if tracking a player, use his name
			fname = va ("spec_%s_%s",
				TP_PlayerName(),
				TP_MapName());
		}
		else
		{	// guess game type and write demo name
			i = TP_CountPlayers();
			if (cl.teamplay && i >= 3)
			{	// Teamplay
				fname = va ("%s_%s_vs_%s_%s",
					TP_PlayerName(),
					TP_PlayerTeam(),
					TP_EnemyTeam(),
					TP_MapName());
			}
			else
			{
				if (i == 2)
				{	// Duel
					fname = va ("%s_vs_%s_%s",
						TP_PlayerName(),
						TP_EnemyName(),
						TP_MapName());
				}
				else if (i > 2)
				{	// FFA
					fname = va ("%s_ffa_%s",
						TP_PlayerName(),
						TP_MapName());
				}
				else
				{	// one player
					fname = va ("%s_%s",
						TP_PlayerName(),
						TP_MapName());
				}
			}
		}
	}

	while((p = strstr(fname, "..")))
	{
		p[0] = '_';
		p[1] = '_';
	}

	// Make sure the filename doesn't contain illegal characters
	for (p=fname ; *p ; p++)
	{
		char c;
		*p &= 0x7F;		// strip high bit
		c = *p;
		if (c<=' ' || c=='?' || c=='*' || (c!=2&&(c=='\\' || c=='/')) || c==':'
			|| c=='<' || c=='>' || c=='"' || c=='.')
			*p = '_';
	}
	strncpy(name, fname, sizeof(name)-1-8);
	name[sizeof(name)-1-8] = '\0';

//make a unique name (unless the user specified it).
	strcat (name, ".qwd");	//we have the space
	if (c != 2)
	{
		vfsfile_t *f;

		f = FS_OpenVFS (name, "rb", FS_GAME);
		if (f)
		{
			COM_StripExtension(name, name, sizeof(name));
			p = name + strlen(name);
			strcat(p, "_XX.qwd");
			p++;
			i = 0;
			do
			{
				VFS_CLOSE (f);
				p[0] = i%100 + '0';
				p[1] = i%10 + '0';
				f = FS_OpenVFS (name, "rb", FS_GAME);
				i++;
			} while (f && i < 100);
		}
	}

//
// open the demo file
//
	cls.demooutfile = FS_OpenVFS (name, "wb", FS_GAME);
	if (!cls.demooutfile)
	{
		Con_Printf ("ERROR: couldn't open.\n");
		return;
	}

	Con_Printf ("recording to %s.\n", name);
	cls.demorecording = true;

/*-------------------------------------------------*/

	switch(cls.protocol)
	{
	case CP_QUAKEWORLD:

	// serverdata
		// send the info about the new client to all connected clients
		memset(&buf, 0, sizeof(buf));
		buf.data = buf_data;
		buf.maxsize = sizeof(buf_data);
		buf.prim = cls.netchan.netprim;

	// send the serverdata
		MSG_WriteByte (&buf, svc_serverdata);
#ifdef PROTOCOL_VERSION_FTE
		if (cls.fteprotocolextensions)	//maintain demo compatability
		{
			MSG_WriteLong (&buf, PROTOCOL_VERSION_FTE);
			MSG_WriteLong (&buf, cls.fteprotocolextensions);
		}
		if (cls.fteprotocolextensions2)	//maintain demo compatability
		{
			MSG_WriteLong (&buf, PROTOCOL_VERSION_FTE2);
			MSG_WriteLong (&buf, cls.fteprotocolextensions2);
		}
#endif
		MSG_WriteLong (&buf, PROTOCOL_VERSION_QW);
		MSG_WriteLong (&buf, cl.servercount);
		MSG_WriteString (&buf, gamedirfile);

		if (cls.fteprotocolextensions2 & PEXT2_MAXPLAYERS)
		{
			MSG_WriteByte (&buf, cl.allocated_client_slots);
			MSG_WriteByte (&buf, cl.splitclients | (cl.spectator?128:0));
			for (i = 0; i < cl.splitclients; i++)
			{
				MSG_WriteByte (&buf, cl.playerview[i].playernum);
			}
		}
		else
		{
			for (i = 0; i < cl.splitclients; i++)
			{
				if (cl.spectator)
					MSG_WriteByte (&buf, cl.playerview[i].playernum | 128);
				else
					MSG_WriteByte (&buf, cl.playerview[i].playernum);
			}
			if (cls.fteprotocolextensions & PEXT_SPLITSCREEN)
				MSG_WriteByte (&buf, 128);
		}

		// send full levelname
		MSG_WriteString (&buf, cl.levelname);

		// send the movevars
		MSG_WriteFloat(&buf, movevars.gravity);
		MSG_WriteFloat(&buf, movevars.stopspeed);
		MSG_WriteFloat(&buf, movevars.maxspeed);
		MSG_WriteFloat(&buf, movevars.spectatormaxspeed);
		MSG_WriteFloat(&buf, movevars.accelerate);
		MSG_WriteFloat(&buf, movevars.airaccelerate);
		MSG_WriteFloat(&buf, movevars.wateraccelerate);
		MSG_WriteFloat(&buf, movevars.friction);
		MSG_WriteFloat(&buf, movevars.waterfriction);
		MSG_WriteFloat(&buf, movevars.entgravity);

		// send server info string
		MSG_WriteByte (&buf, svc_stufftext);
		MSG_WriteString (&buf, va("fullserverinfo \"%s\"\n", cl.serverinfo) );

		// send music (delayed)
		MSG_WriteByte (&buf, svc_cdtrack);
		MSG_WriteByte (&buf, 0); // none in demos

#ifdef PEXT_SETVIEW
		if (cl.playerview[0].viewentity != cl.playerview[0].playernum+1)	//tell the player if we have a different view entity
		{
			MSG_WriteByte (&buf, svc_setview);
			MSG_WriteEntity (&buf, cl.playerview[0].viewentity);
		}
#endif
		// flush packet
		CL_WriteRecordDemoMessage (&buf, seq++);
		SZ_Clear (&buf);

	// soundlist
		MSG_WriteByte (&buf, svc_soundlist);
		MSG_WriteByte (&buf, 0);

		n = 0;
		s = cl.sound_name[n+1];
		while (*s)
		{
			MSG_WriteString (&buf, s);
			if (buf.cursize > MAX_QWMSGLEN/2)
			{
				MSG_WriteByte (&buf, 0);
				MSG_WriteByte (&buf, n);
				CL_WriteRecordDemoMessage (&buf, seq++);
				SZ_Clear (&buf);
				MSG_WriteByte (&buf, svc_soundlist);
				MSG_WriteByte (&buf, n + 1);
			}
			n++;
			s = cl.sound_name[n+1];
		}
		if (buf.cursize)
		{
			MSG_WriteByte (&buf, 0);
			MSG_WriteByte (&buf, 0);
			CL_WriteRecordDemoMessage (&buf, seq++);
			SZ_Clear (&buf);
		}

	// modellist
		MSG_WriteByte (&buf, svc_modellist);
		MSG_WriteByte (&buf, 0);

		n = 0;
		s = cl.model_name[n+1];
		while (*s)
		{
			MSG_WriteString (&buf, s);
			if (buf.cursize > MAX_QWMSGLEN/2)
			{
				MSG_WriteByte (&buf, 0);
				MSG_WriteByte (&buf, n);
				CL_WriteRecordDemoMessage (&buf, seq++);
				SZ_Clear (&buf);
				MSG_WriteByte (&buf, svc_modellist);
				MSG_WriteByte (&buf, n + 1);
			}
			n++;
			s = cl.model_name[n+1];
		}
		if (buf.cursize)
		{
			MSG_WriteByte (&buf, 0);
			MSG_WriteByte (&buf, 0);
			CL_WriteRecordDemoMessage (&buf, seq++);
			SZ_Clear (&buf);
		}

	// spawnstatic

		for (i = 0; i < cl.num_statics; i++)
		{
			ent = &cl_static_entities[i].ent;

			MSG_WriteByte (&buf, svc_spawnstatic);

			for (j = 1; j < MAX_MODELS; j++)
				if (ent->model == cl.model_precache[j])
					break;
			if (j == MAX_MODELS)
				MSG_WriteByte (&buf, 0);
			else
				MSG_WriteByte (&buf, j);

			MSG_WriteByte (&buf, ent->framestate.g[FS_REG].frame[0]);
			MSG_WriteByte (&buf, 0);
			MSG_WriteByte (&buf, ent->skinnum);
			for (j=0 ; j<3 ; j++)
			{
				MSG_WriteCoord (&buf, ent->origin[j]);
				MSG_WriteAngle (&buf, ent->angles[j]);
			}

			if (buf.cursize > MAX_QWMSGLEN/2)
			{
				CL_WriteRecordDemoMessage (&buf, seq++);
				SZ_Clear (&buf);
			}
		}

	// spawnstaticsound
		// static sounds are skipped in demos, life is hard

	// baselines

		for (i = 0; i < cl_baselines_count; i++)
		{
			es = cl_baselines + i;

			if (memcmp(es, &nullentitystate, sizeof(nullentitystate)))
			{
				MSG_WriteByte (&buf,svc_spawnbaseline);
				MSG_WriteEntity (&buf, i);

				MSG_WriteByte (&buf, es->modelindex);
				MSG_WriteByte (&buf, es->frame);
				MSG_WriteByte (&buf, es->colormap);
				MSG_WriteByte (&buf, es->skinnum);
				for (j=0 ; j<3 ; j++)
				{
					MSG_WriteCoord(&buf, es->origin[j]);
					MSG_WriteAngle(&buf, es->angles[j]);
				}

				if (buf.cursize > MAX_QWMSGLEN/2)
				{
					CL_WriteRecordDemoMessage (&buf, seq++);
					SZ_Clear (&buf);
				}
			}
		}

		MSG_WriteByte (&buf, svc_stufftext);
		MSG_WriteString (&buf, va("cmd spawn %i\n", cl.servercount) );

		if (buf.cursize)
		{
			CL_WriteRecordDemoMessage (&buf, seq++);
			SZ_Clear (&buf);
		}

	// send current status of all other players

		for (i = 0; i < cl.allocated_client_slots; i++)
		{
			player = cl.players + i;

			if (player->frags != 0)
			{
				MSG_WriteByte (&buf, svc_updatefrags);
				MSG_WriteByte (&buf, i);
				MSG_WriteShort (&buf, player->frags);
			}

			if (player->ping != 0)
			{
				MSG_WriteByte (&buf, svc_updateping);
				MSG_WriteByte (&buf, i);
				MSG_WriteShort (&buf, player->ping);
			}

			if (player->pl != 0)
			{
				MSG_WriteByte (&buf, svc_updatepl);
				MSG_WriteByte (&buf, i);
				MSG_WriteByte (&buf, player->pl);
			}

			if (*player->userinfo)
			{
				MSG_WriteByte (&buf, svc_updateentertime);
				MSG_WriteByte (&buf, i);
				MSG_WriteFloat (&buf, player->entertime);
			}

			if (*player->userinfo)
			{
				MSG_WriteByte (&buf, svc_updateuserinfo);
				MSG_WriteByte (&buf, i);
				MSG_WriteLong (&buf, player->userid);
				MSG_WriteString (&buf, player->userinfo);
			}

			if (buf.cursize > MAX_QWMSGLEN/2)
			{
				CL_WriteRecordDemoMessage (&buf, seq++);
				SZ_Clear (&buf);
			}
		}

	// send all current light styles
		for (i=0 ; i<MAX_LIGHTSTYLES ; i++)
		{
			if (i >= MAX_STANDARDLIGHTSTYLES)
				if (!*cl_lightstyle[i].map)
					continue;

#ifdef PEXT_LIGHTSTYLECOL
			if ((cls.fteprotocolextensions & PEXT_LIGHTSTYLECOL) && (cl_lightstyle[i].colours[0]!=1||cl_lightstyle[i].colours[1]!=1||cl_lightstyle[i].colours[2]!=1) && *cl_lightstyle[i].map)
			{
				MSG_WriteByte (&buf, svcfte_lightstylecol);
				MSG_WriteByte (&buf, (unsigned char)i);
				MSG_WriteByte (&buf, 0x87);
				MSG_WriteShort (&buf, cl_lightstyle[i].colours[0]*1024);
				MSG_WriteShort (&buf, cl_lightstyle[i].colours[1]*1024);
				MSG_WriteShort (&buf, cl_lightstyle[i].colours[2]*1024);
				MSG_WriteString (&buf, cl_lightstyle[i].map);
			}
			else
#endif
			{
				MSG_WriteByte (&buf, svc_lightstyle);
				MSG_WriteByte (&buf, (unsigned char)i);
				MSG_WriteString (&buf, cl_lightstyle[i].map);
			}
		}

		for (i = ((cls.fteprotocolextensions&PEXT_HEXEN2)?MAX_QW_STATS:MAX_CL_STATS); i >= 0; i--)
		{
			if (!cl.playerview[0].stats[i])
				continue;
			MSG_WriteByte (&buf, svcqw_updatestatlong);
			MSG_WriteByte (&buf, i);
			MSG_WriteLong (&buf, cl.playerview[0].stats[i]);
			if (buf.cursize > MAX_QWMSGLEN/2)
			{
				CL_WriteRecordDemoMessage (&buf, seq++);
				SZ_Clear (&buf);
			}
		}

		// get the client to check and download skins
		// when that is completed, a begin command will be issued
		MSG_WriteByte (&buf, svc_stufftext);
		MSG_WriteString (&buf, va("skins\n") );

		CL_WriteRecordDemoMessage (&buf, seq++);

		CL_WriteSetDemoMessage();

		// done
		break;
	default:
		Con_Printf("Unable to begin demo recording with this network protocol\n");
		CL_Stop_f();
		break;
	}
}

/*
====================
CL_ReRecord_f

record <demoname>
====================
*/
void CL_ReRecord_f (void)
{
	int		c;
	char	name[MAX_OSPATH];
	char *s;

	c = Cmd_Argc();
	if (c != 2)
	{
		Con_Printf ("rerecord <demoname>\n");
		return;
	}

	if (!*cls.servername) {
		Con_Printf("No server to reconnect to...\n");
		return;
	}

	if (cls.demorecording)
		CL_Stop_f();

	s = Cmd_Argv(1);
	if (strstr(s, ".."))
	{
		Con_Printf ("Relative paths not allowed.\n");
		return;
	}

	Q_snprintfz (name, sizeof(name), "%s", s);

//
// open the demo file
//
	COM_RequireExtension (name, ".qwd", sizeof(name));

	cls.demooutfile = FS_OpenVFS (name, "wb", FS_GAME);
	if (!cls.demooutfile)
	{
		Con_Printf ("ERROR: couldn't open.\n");
		return;
	}

	Con_Printf ("recording to %s.\n", name);
	cls.demorecording = true;

	CL_Disconnect();
	CL_BeginServerReconnect();
}

#ifdef WEBCLIENT
void CL_PlayDownloadedDemo(char *name, qboolean success)
{
	if (success == false)
		Con_Printf("Failed to download %s\n", name);
	else
	{
		Cbuf_AddText(va("playdemo %s\n", name), RESTRICT_LOCAL);
	}
}
#endif

/*
====================
CL_PlayDemo_f

play [demoname]
====================
*/
void CL_PlayDemo_f (void)
{
	char *demoname;
	if (Cmd_Argc() != 2)
	{
		Con_Printf ("playdemo <demoname> : plays a demo\n");
		return;
	}

	if (cls.state == ca_demostart)
		cls.state = ca_disconnected;

#ifdef WEBCLIENT
#ifdef warningmsg
#pragma warningmsg("playdemo http://blah is broken right now")
#endif
#if 0
	if (!strncmp(Cmd_Argv(1), "ftp://", 6) || !strncmp(Cmd_Argv(1), "http://", 7))
	{
		if (Cmd_ExecLevel == RESTRICT_LOCAL)
			HTTP_CL_Get(Cmd_Argv(1), COM_SkipPath(Cmd_Argv(1)), CL_PlayDownloadedDemo);
		return;
	}
#endif
#endif

	demoname = Cmd_Argv(1);
	if (*demoname == '#' && Cmd_FromGamecode())
		return;
	CL_PlayDemo(demoname);
}

void CL_DemoStreamFullyDownloaded(struct dl_download *dl)
{
	//let the file get closed by the demo playback code.
	dl->file = NULL;
	//kill the reference now that its done.
	if (cls.demoindownload == dl)
		cls.demoindownload = NULL;
}
//dl is provided so that we can receive files via chunked/gziped http downloads and on systems that don't provide sockets etc. its tracked so we can cancel the download if the client aborts playback early.
void CL_PlayDemoStream(vfsfile_t *file, struct dl_download *dl, char *filename, int demotype, float bufferdelay)
{
	int protocol = CP_UNKNOWN;

	if (demotype == DPB_NONE)
	{
		//peek etc?
	}

	switch(demotype)
	{
	case DPB_EZTV:
	case DPB_MVD:
	case DPB_QUAKEWORLD:
		protocol = CP_QUAKEWORLD;
		break;
#ifdef Q2CLIENT
	case DPB_QUAKE2:
		protocol = CP_QUAKE2;
		break;
#endif
#ifdef NQPROT
	case DPB_NETQUAKE:
		protocol = CP_NETQUAKE;
		break;
#endif
	default:
		break;
	}

	if (protocol == CP_UNKNOWN)
	{
		Con_Printf ("ERROR: demo format not supported: \"%s\".\n", filename);
		return;
	}

	if (dl)
		dl->notifycomplete = CL_DemoStreamFullyDownloaded;

//
// disconnect from server
//
	CL_Disconnect_f ();

	demo_flushcache();
//
// open the demo file
//
	cls.demoindownload = dl;
	cls.demoinfile = file;
	if (!cls.demoinfile)
	{
		Con_Printf ("ERROR: couldn't open \"%s\".\n", filename);
		cls.demonum = -1;		// stop demo loop
		return;
	}
	if (filename)
	{
		Q_strncpyz (lastdemoname, filename, sizeof(lastdemoname));
		Con_Printf ("Playing demo from %s.\n", filename);
	}

	cls.findtrack = (demotype == DPB_MVD || demotype == DPB_EZTV);

	cls.demoplayback = demotype;
	cls.protocol = protocol;
	cls.state = ca_demostart;
	net_message.packing = SZ_RAWBYTES;
	Netchan_Setup (NS_CLIENT, &cls.netchan, &net_from, 0);

	demtime = -bufferdelay;
	cl.gametime = -bufferdelay;
	cl.gametimemark = demtime;
	if (demtime < -0.5)
		Con_Printf("Buffering for %g seconds\n", bufferdelay);
	cls.netchan.last_received=demtime;

	TP_ExecTrigger ("f_demostart");
}

vfsfile_t *CL_OpenFileInZipOrSys(char *name)
{
	if (*name == '#')
		return VFSOS_Open(name+1, "rb");
	else
		return CL_OpenFileInPackage(NULL, name);
}
void CL_PlayDemo(char *demoname)
{
	char	name[256];
	qofs_t start;
	vfsfile_t *f;

//
// open the demo file
//
	Q_strncpyz (name, demoname, sizeof(name));
	COM_DefaultExtension (name, ".qwd", sizeof(name));
	f = CL_OpenFileInZipOrSys(name);
	if (!f)
	{
		Q_strncpyz (name, demoname, sizeof(name));
		COM_DefaultExtension (name, ".dem", sizeof(name));
		if (*name == '#')
			f = VFSOS_Open(name+1, "rb");
		else
			f = FS_OpenVFS(name, "rb", FS_GAME);
	}
	if (!f)
	{
		Q_strncpyz (name, demoname, sizeof(name));
		COM_DefaultExtension (name, ".mvd", sizeof(name));
		if (*name == '#')
			f = VFSOS_Open(name+1, "rb");
		else
			f = FS_OpenVFS(name, "rb", FS_GAME);
	}
	if (!f)
	{
		Con_Printf ("ERROR: couldn't open \"%s\".\n", demoname);
		cls.demonum = -1;		// stop demo loop
		return;
	}
	Q_strncpyz (lastdemoname, demoname, sizeof(lastdemoname));

	if (!VFS_GETLEN (f))
	{
		VFS_CLOSE(f);
		Con_Printf ("demo \"%s\" is empty.\n", demoname);
		return;
	}

	//figure out where we started
	start = VFS_TELL(f);

#ifdef Q2CLIENT
	{
		int len;
		char type;
		int protocol;
		//check if its a quake2 demo.
		VFS_READ(f, &len, sizeof(len));
		VFS_READ(f, &type, sizeof(type));
		VFS_READ(f, &protocol, sizeof(protocol));
		VFS_SEEK(f, start);
		if (len > 5 && type == svcq2_serverdata && protocol == PROTOCOL_VERSION_Q2)
		{
			CL_PlayDemoStream(f, NULL, name, DPB_QUAKE2, 0);
			return;
		}
	}
#endif

#ifdef NQPROT
	{
		int ft = 0, neg = false;
		char chr;
		//not quake2, check if its NQ
		//work out if the first line is a int for the track number.
		while ((VFS_READ(f, &chr, 1)==1) && (chr != '\n'))
		{
			if (chr == ' ')
				;
			else if (chr == '-')
				neg = true;
			else if (chr < '0' || chr > '9')
				break;
			else
				ft = ft * 10 + ((int)chr - '0');
		}
		if (neg)
			ft *= -1;
		if (chr == '\n')
		{
			CL_PlayDemoStream(f, NULL, name, DPB_NETQUAKE, 0);
			return;
		}
		VFS_SEEK(f, start);
	}
#endif

	//its not NQ then. must be QuakeWorld, either .qwd or .mvd
	//could also be .qwz or .dmz or whatever that nq extension is. we don't support either.

	//mvd and qwd have no identifying markers, other than the extension.
	if (!Q_strcasecmp(name + strlen(name) - 3, "mvd") ||
		!Q_strcasecmp(name + strlen(name) - 6, "mvd.gz"))
		CL_PlayDemoStream(f, NULL, name, DPB_MVD, 0);
	else
		CL_PlayDemoStream(f, NULL, name, DPB_QUAKEWORLD, 0);
}

/*used with qtv*/
void CL_Demo_ClientCommand(char *commandtext)
{
	unsigned char b = 1;
	unsigned short len = LittleShort((unsigned short)(strlen(commandtext) + 4));
#ifdef warningmsg
#pragma warningmsg("this needs buffering safely")
#endif
	if (cls.demoplayback == DPB_EZTV)
	{
		VFS_WRITE(cls.demoinfile, &len, sizeof(len));
		VFS_WRITE(cls.demoinfile, &b, sizeof(b));
		VFS_WRITE(cls.demoinfile, commandtext, strlen(commandtext)+1);
	}
}

char qtvhostname[1024];
char qtvrequestbuffer[4096];
int qtvrequestsize;
char qtvrequestcmdbuffer[4096];
int qtvrequestcmdsize;
vfsfile_t *qtvrequest;

void CL_QTVPoll (void)
{
	char *s, *e, *colon;
	char *tail = NULL;
	int len;
	qboolean streamavailable = false;
	qboolean saidheader = false;
	menu_t *sourcesmenu = NULL;
	int sourcenum = 0;

	int streamid;
	int numplayers = 0;
	int numviewers = 0;
	qboolean init_numplayers = false;
	qboolean init_numviewers = false;
	qboolean iseztv = false;
	char srchost[256];


	if (!qtvrequest)
		return;

	if (qtvrequestcmdsize)
	{
		len = VFS_WRITE(qtvrequest, qtvrequestcmdbuffer, qtvrequestcmdsize);
		if (len > 0)
		{
			memmove(qtvrequestcmdbuffer, qtvrequestcmdbuffer+len, qtvrequestcmdsize-len);
			qtvrequestcmdsize -= len;
		}
	}

	for(;;)
	{
		len = VFS_READ(qtvrequest, qtvrequestbuffer+qtvrequestsize, (sizeof(qtvrequestbuffer) - qtvrequestsize -1 > 0)?1:0);
		if (len <= 0)
			break;
		qtvrequestsize += len;
	}
	qtvrequestbuffer[qtvrequestsize] = '\0';

	if (qtvrequestsize >= sizeof(qtvrequestbuffer) - 1)
	{
		//flag it as an error if the response is larger than we can handle.
		//this error gets ignored if the header is okay (any actual errors will get reported again by the demo code anyway), and only counts if the end of the reply header was not found.
		len = -1;
	}
	if (!qtvrequestsize && len == 0)
		return;

	//make sure it's a compleate chunk.
	for (s = qtvrequestbuffer; *s; s++)
	{
		if (s[0] == '\n' && s[1] == '\n')
		{
			tail = s+2;
			break;
		}
		if (s[0] == '\r' && s[1] == '\n' && s[2] == '\r' && s[3] == '\n')
		{
			tail = s+4;
			break;
		}
		if (s[0] == '\r' && s[1] == '\n' && s[2] == '\n')
		{
			tail = s+3;
			break;
		}
		if (s[0] == '\n' && s[1] == '\r' && s[2] == '\n')
		{
			tail = s+3;
			break;
		}
	}
	if (!tail)
	{
		if (len < 0)
		{
			Con_Printf("invalid QTV handshake\n");
			SCR_SetLoadingStage(LS_NONE);
			VFS_CLOSE(qtvrequest);
			qtvrequest = NULL;
			qtvrequestsize = 0;
		}
		return;
	}
	s[1] = '\0';	//make sure its null terminated before the data payload
	s = qtvrequestbuffer;
	for (e = s; *e; )
	{
		if (*e == '\r')
			*e = '\0';
		else if (*e == '\n')
		{
			*e = '\0';
			colon = strchr(s, ':');
			if (colon)
				*colon++ = '\0';
			else
				colon = "";

			if (!strcmp(s, "PERROR"))
			{	//printable error
				Con_Printf("QTV Error:\n%s\n", colon);
			}
			else if (!strcmp(s, "PRINT"))
			{	//printable error
				Con_Printf("QTV:\n%s\n", colon);
			}
			else if (!strcmp(s, "TERROR"))
			{	//printable error
				Con_Printf("QTV Error:\n%s\n", colon);
			}
			else if (!strcmp(s, "ADEMO"))
			{	//printable error
				Con_Printf("Demo%s is available\n", colon);
			}

			//generic sourcelist responce
			else if (!strcmp(s, "ASOURCE"))
			{	//printable source
				if (!saidheader)
				{
					saidheader=true;
					Con_Printf("Available Sources:\n");
				}
				Con_Printf("%s\n", colon);
				//we're too lazy to even try and parse this
			}

			else if (!strcmp(s, "BEGIN"))
			{
				while (*colon && *(unsigned char*)colon <= ' ')
					colon++;
				if (*colon)
					Con_Printf("streaming \"%s\" from qtv\n", colon);
				else
					Con_Printf("qtv connection established to %s\n", qtvhostname);
				streamavailable = true;
			}

			//eztv extensions to v1.0
			else if (!strcmp(s, "QTV_EZQUAKE_EXT"))
			{
				iseztv = true;
				Con_Printf("Warning: eztv extensions %s\n", colon);
			}

			//v1.1 sourcelist response includes SRCSRV, SRCHOST, SRCPLYRS, SRCVIEWS, SRCID
			else if (!strcmp(s, "SRCSRV"))
			{
				//the proxy's source string (beware of file:blah without file:blah@blah)
			}
			else if (!strcmp(s, "SRCHOST"))
			{
				//the hostname from the server the stream came from
				Q_strncpyz(srchost, colon, sizeof(srchost));
			}
			else if (!strcmp(s, "SRCPLYRS"))
			{
				//number of active players actually playing on that stream
				numplayers = atoi(colon);
				init_numplayers = true;
			}
			else if (!strcmp(s, "SRCVIEWS"))
			{
				//number of people watching this stream on the proxy itself
				numviewers = atoi(colon);
				init_numviewers = true;
			}
			else if (!strcmp(s, "SRCID"))
			{
				streamid = atoi(colon);

				//now put it on a menu
				if (!sourcesmenu)
				{
					m_state = m_complex;
					Key_Dest_Add(kdm_menu);
					sourcesmenu = M_CreateMenu(0);

					MC_AddPicture(sourcesmenu, 16, 4, 32, 144, "gfx/qplaque.lmp");
					MC_AddCenterPicture(sourcesmenu, 4, 24, "gfx/p_option.lmp");
				}
				if (init_numplayers == true && init_numviewers == true)
					MC_AddConsoleCommand(sourcesmenu, 42, 170, (sourcenum++)*8 + 32, va("%s (p%i, v%i)", srchost, numplayers, numviewers), va("qtvplay %i@%s\n", streamid, qtvhostname));
				//else
				//	FIXME: add error message here
			}
			//end of sourcelist entry

			//from e to s, we have a line
			s = e+1;
		}
		e++;
	}

	if (streamavailable)
	{
		CL_PlayDemoStream(qtvrequest, NULL, NULL, iseztv?DPB_EZTV:DPB_MVD, BUFFERTIME);
		qtvrequest = NULL;
		demo_resetcache(qtvrequestsize - (tail-qtvrequestbuffer), tail);
		return;
	}

	SCR_SetLoadingStage(LS_NONE);
	VFS_CLOSE(qtvrequest);
	qtvrequest = NULL;
	qtvrequestsize = 0;
}

char *strchrrev(char *str, char chr)
{
	char *firstchar = str;
	for (str = str + strlen(str)-1; str>=firstchar; str--)
		if (*str == chr)
			return str;

	return NULL;
}

void CL_ParseQTVFile(vfsfile_t *f, const char *fname, qtvfile_t *result)
{
	char buffer[2048];
	char *s;
	memset(result, 0, sizeof(*result));
	if (!f)
	{
		Con_Printf("Couldn't open QTV file: %s\n", fname);
		return;
	}
	if (!VFS_GETS(f, buffer, sizeof(buffer)-1))
	{
		Con_Printf("Empty QTV file: %s\n", fname);
		VFS_CLOSE(f);
		return;
	}
	s = buffer;
	while (*s == ' ' || *s == '\t')
		s++;
	if (*s != '[')
	{
		Con_Printf("Bad QTV file: %s\n", fname);
		VFS_CLOSE(f);
		return;
	}
	s++;
	while (*s == ' ' || *s == '\t')
		s++;
	if (strnicmp(s, "QTV", 3))
	{
		Con_Printf("Bad QTV file: %s\n", fname);
		VFS_CLOSE(f);
		return;
	}
	s+=3;
	while (*s == ' ' || *s == '\t')
		s++;
	if (*s != ']')
	{
		Con_Printf("Bad QTV file: %s\n", fname);
		VFS_CLOSE(f);
		return;
	}
	s++;
	while (*s == ' ' || *s == '\t' || *s == '\r')
		s++;
	if (*s)
	{
		Con_Printf("Bad QTV file: %s\n", fname);
		VFS_CLOSE(f);
		return;
	}

	while (VFS_GETS(f, buffer, sizeof(buffer)-1))
	{
		s = COM_ParseToken(buffer, ":=");
		if (*s != '=' && *s != ':')
			s = "";
		else
			s++;

		if (!stricmp(com_token, "stream"))
		{
			result->connectiontype = QTVCT_STREAM;
			s = COM_ParseOut(s, result->server, sizeof(result->server));
		}
		else if (!stricmp(com_token, "connect"))
		{
			result->connectiontype = QTVCT_CONNECT;
			s = COM_ParseOut(s, result->server, sizeof(result->server));
		}
		else if (!stricmp(com_token, "join"))
		{
			result->connectiontype = QTVCT_JOIN;
			s = COM_ParseOut(s, result->server, sizeof(result->server));
		}
		else if (!stricmp(com_token, "observe"))
		{
			result->connectiontype = QTVCT_OBSERVE;
			s = COM_ParseOut(s, result->server, sizeof(result->server));
		}
		else if (!stricmp(com_token, "splash"))
		{
			s = COM_ParseOut(s, result->splashscreen, sizeof(result->server));
		}
	}
	VFS_CLOSE(f);
}

void CL_ParseQTVDescriptor(vfsfile_t *f, const char *name)
{
	char buffer[1024];
	char *s;

	if (!f)
	{
		Con_Printf("Couldn't open QTV file: %s\n", name);
		return;
	}
	while (VFS_GETS(f, buffer, sizeof(buffer)-1))
	{
		if (!strncmp(buffer, "Stream=", 7) || !strncmp(buffer, "Stream:", 7))
		{
			for (s = buffer + strlen(buffer)-1; s >= buffer; s--)
			{
				if (*s == '\r' || *s == '\n' || *s == ';')
					*s = 0;
				else
					break;
			}
			s = buffer+7;
			while(*s && *s <= ' ')
				s++;
			Cbuf_AddText(va("qtvplay \"%s\"\n", s), Cmd_ExecLevel);
			break;
		}
		if (!strncmp(buffer, "Connect=", 8) || !strncmp(buffer, "Connect:", 8))
		{
			for (s = buffer + strlen(buffer)-1; s >= buffer; s--)
			{
				if (*s == '\r' || *s == '\n' || *s == ';')
					*s = 0;
				else
					break;
			}
			s = buffer+8;
			while(*s && *s <= ' ')
				s++;
			Cbuf_AddText(va("connect \"%s\"\n", s), Cmd_ExecLevel);
			break;
		}
		if (!strncmp(buffer, "Join=", 5) || !strncmp(buffer, "Join:", 5))
		{
			for (s = buffer + strlen(buffer)-1; s >= buffer; s--)
			{
				if (*s == '\r' || *s == '\n' || *s == ';')
					*s = 0;
				else
					break;
			}
			s = buffer+5;
			while(*s && *s <= ' ')
				s++;
			Cbuf_AddText(va("join \"%s\"\n", s), Cmd_ExecLevel);
			break;
		}
		if (!strncmp(buffer, "Observe=", 8) || !strncmp(buffer, "Observe:", 8))
		{
			for (s = buffer + strlen(buffer)-1; s >= buffer; s--)
			{
				if (*s == '\r' || *s == '\n' || *s == ';')
					*s = 0;
				else
					break;
			}
			s = buffer+8;
			while(*s && *s <= ' ')
				s++;
			Cbuf_AddText(va("observe \"%s\"\n", s), Cmd_ExecLevel);
			break;
		}
	}
	VFS_CLOSE(f);
}

void CL_QTVPlay_f (void)
{
	qboolean raw=0;
	char *connrequest;
	vfsfile_t *newf;
	char *host;
	char msg[4096];
	int msglen=0;

	if (Cmd_Argc() < 2)
	{
		Con_Printf("Usage: qtvplay [stream@]hostname[:port] [password]\n");
		return;
	}

	connrequest = Cmd_Argv(1);

	if (*connrequest == '#')
	{
		//#FILENAME is a local system path
		CL_ParseQTVDescriptor(VFSOS_Open(connrequest+1, "rt"), connrequest+1);
		return;
	}
	strcpy(cls.servername, "qtv:");
	Q_strncpyz(cls.servername+4, connrequest, sizeof(cls.servername)-4);

	SCR_SetLoadingStage(LS_CONNECTION);

	host = connrequest;

	connrequest = strchrrev(connrequest, '@');
	if (connrequest)
		host = connrequest+1;
	Q_strncpyz(qtvhostname, host, sizeof(qtvhostname));
	newf = FS_OpenTCP(qtvhostname, 27599);

	if (!newf)
	{
		SCR_SetLoadingStage(LS_NONE);
		Con_Printf("Couldn't connect to proxy\n");
		return;
	}

	host = Cmd_Argv(1);
	if (connrequest)
		*connrequest = '\0';
	else
		host = NULL;

	if (qtvcl_forceversion1.ival)
	{
		Q_snprintfz(msg+msglen, sizeof(msg)-msglen,
					"QTV\n"
					"VERSION: 1.0\n");
	}
	else
	{
		Q_snprintfz(msg+msglen, sizeof(msg)-msglen,
					"QTV\n"
					"VERSION: 1.1\n");
	}
	msglen += strlen(msg+msglen);

	if (qtvcl_eztvextensions.ival)
	{
		raw = 0;

		Q_snprintfz(msg+msglen, sizeof(msg)-msglen,
				"QTV_EZQUAKE_EXT: 3\n"
				"USERINFO: %s\n", cls.userinfo[0]);
		msglen += strlen(msg+msglen);
	}
	else if (raw)
	{
		Q_snprintfz(msg+msglen, sizeof(msg)-msglen,
				"RAW: 1\n");
		msglen += strlen(msg+msglen);
	}
	if (host)
	{
		Q_snprintfz(msg+msglen, sizeof(msg)-msglen,
			"SOURCE: %s\n", host);
		msglen += strlen(msg+msglen);
	}
	else
	{
		Q_snprintfz(msg+msglen, sizeof(msg)-msglen,
				"SOURCELIST\n");
		msglen += strlen(msg+msglen);
	}

	Q_snprintfz(msg+msglen, sizeof(msg)-msglen,
				"\n");
	msglen += strlen(msg+msglen);

	if (raw)
	{
		VFS_WRITE(newf, msg, msglen);
		CL_PlayDemoStream(qtvrequest, NULL, qtvhostname, DPB_MVD, BUFFERTIME);
	}
	else
	{
		if (qtvrequest)
			VFS_CLOSE(qtvrequest);

		memcpy(qtvrequestcmdbuffer, msg, msglen);
		qtvrequestcmdsize = msglen;
		qtvrequest = newf;
		qtvrequestsize = 0;
	}
}

void CL_QTVList_f (void)
{
	char *connrequest;
	vfsfile_t *newf;
	newf = FS_OpenTCP(qtvhostname, 27599);

	if (!newf)
	{
		Con_Printf("Couldn't connect to proxy\n");
		return;
	}

	if (qtvcl_forceversion1.ival)
	{
		connrequest =	"QTV\n"
				"VERSION: 1.0\n";
	}
	else
	{
		connrequest =	"QTV\n"
				"VERSION: 1.1\n";
	}
	VFS_WRITE(newf, connrequest, strlen(connrequest));
	connrequest =	"SOURCELIST\n";
	VFS_WRITE(newf, connrequest, strlen(connrequest));
	connrequest =	"\n";
	VFS_WRITE(newf, connrequest, strlen(connrequest));

	if (qtvrequest)
		VFS_CLOSE(qtvrequest);
	qtvrequest = newf;
	qtvrequestsize = 0;
}

void CL_QTVDemos_f (void)
{
	char *connrequest;
	vfsfile_t *newf;
	newf = FS_OpenTCP(Cmd_Argv(1), 27599);

	if (!newf)
	{
		Con_Printf("Couldn't connect to proxy\n");
		return;
	}

	connrequest =	"QTV\n"
					"VERSION: 1\n";
	VFS_WRITE(newf, connrequest, strlen(connrequest));
	connrequest =	"DEMOLIST\n";
	VFS_WRITE(newf, connrequest, strlen(connrequest));
	connrequest =	"\n";
	VFS_WRITE(newf, connrequest, strlen(connrequest));

	if (qtvrequest)
		VFS_CLOSE(qtvrequest);
	qtvrequest = newf;
	qtvrequestsize = 0;
}

/*
====================
CL_FinishTimeDemo

====================
*/
void CL_FinishTimeDemo (void)
{
	int		frames;
	float	time;
	cvar_t *vw;

	cls.timedemo = false;

	// loading frames don't count
	if (cls.td_startframe == -1)
	{
		Con_Printf ("demo didn't finish loading\n");
		frames = 0;
	}
	else
		frames = (host_framecount - cls.td_startframe) - 1;
	time = Sys_DoubleTime() - cls.td_starttime;
	if (!time)
		time = 1;
	Con_Printf ("%i frames %5.1f seconds %5.1f fps\n", frames, time, frames/time);

	cls.td_startframe = 0;

	TP_ExecTrigger ("f_timedemoend");

	vw = Cvar_FindVar("vid_wait");
	Cvar_Set(vw, vw->string);
}

/*
====================
CL_TimeDemo_f

timedemo [demoname]
====================
*/
void CL_TimeDemo_f (void)
{
	cvar_t *vw;
	if (Cmd_Argc() != 2)
	{
		Con_Printf ("timedemo <demoname> : gets demo speeds\n");
		return;
	}

	CL_PlayDemo_f ();

	if (cls.state != ca_demostart)
		return;

	vw = Cvar_FindVar("vid_wait");
	if (vw)
	{
		char *t = vw->string;
		vw->string = "0";
		vw->value = 0;
		Cvar_ForceCallback(vw);
		vw->string = t;
	}

//read the initial frame so load times don't count as part of the time
//	CL_ReadPackets();

// cls.td_starttime will be grabbed at the second frame of the demo, so
// all the loading time doesn't get counted

	cls.timedemo = true;
	cls.td_starttime = Sys_DoubleTime();
	cls.td_startframe = -1;
	cls.td_lastframe = -1;		// get a new message this frame
}